I've just published draft #4 of SRFI 155.  It was submitted by
Marc Nieper-Wißkirchen, author of the SRFI.

  <https://srfi.schemers.org/srfi-155/>

Here are the Marc's comments on the draft:

  - Mention and add Inferior Scheme, which implements the
  specification fully and without space-leaks.

  - Update the included implementation of SRFI 154.

  - Special thanks to Jim Rees.

  - Added performance test for nested calls

  - Rename closed-lambda to dynamic-lambda

  File Changes
    A .gitmodules (3)
    A inferior-scheme (1)
    M srfi-155.html (24)
    M srfi/154.chibi.scm (20)
    M srfi/154.closed-lambda.scm (4)
    M srfi/154.scm (4)
    M srfi/154.sld (7)
    M srfi/155/implementation.157.scm (18)
    M srfi/155/implementation.lazy.scm (26)
    M srfi/155/test.scm (25)

Here's the diff:

  <https://github.com/scheme-requests-for-implementation/srfi-155/compare/3fec341fbed10a91c83853a2000e1e4f6d3fb299...3104bb675c290f5570e4fdb27e6f984e3cbd28dd>

Regards,

SRFI Editor